Thermodynamical and structural properties of amorphous Fe80B20 and Fe80P13C7 alloys

Abstract

C, alloys as heat capacity and electric resistivity in the temperature range 1.5 to 300 K, magnetoresistance in perpendicular and parallel magnetic fields up to = 4.78 X 10' A/m, magnetization, and the Mossbauer effect at 100 and 300 K are investigated. The data obtained are interpreted in t e r m of the hypothesis of short-range order and weakly-coupled "paramagnetic" centres in a ferromagnetic matrix. A phenomenological description of magnetoresistance data is given and a correlation with the Mossbauer data is discussed. npOBeAeH0 HCCJleAOBaHHe TenJIOeMHOCTH EI 3JIeKTpOCOIlpOTElBJIeHHfl aMOP@HbIX CIlJlaBOB FemB,, H Fe,,P,,C, B HHTepBaJIe TeMnepaTyp 1,s a0 300 K , MarHeTOCOIIpOTHBJIeHUfl B nepneHnnHynspHMx H napannenmmx nonfix AO w 4,78 x 1 0 ' A/m, naMarHmeHHocTn H a @ @ e~~a Mecc6ayapa npu TeMnepaTypax 100 u 300 K. nonyremble aamme umepnpe-TEl PYIOTCR Ha OCHOBe rHlTOTe3bI KOMl l OaWl IHOHHOTO 6 n~m~e r o IIOpflHKa EI cna6o CBR3aHHblX ,,llaPaMaI' HEITHbIX" UeHTpOB B @ePPOMal' HHTHOfi MaTpHUe. &aHO @eHOMeHOJIOrH9eCHOe OnH-CaHHe pe3yJIbTaTOB H3MepeHEIR MarHeTOCOl' lpOTHBneHHR H 06cy~c~ae~cfl HOppeJIflUHfl C MeCC6aY3pOBCKEIMH ,TJPHH€dMH.